Products comprising reinforcing fibres and shape memory alloy wires and methods of making thereof

A technology of reinforcing fibers and memory alloys, which is applied in the field of three-dimensional preforms, can solve the problems of poor interlayer properties, poor impact damage resistance, and low delamination resistance of composite materials.

Inactive Publication Date: 2020-02-18
QINETIQ LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, many composites of this type are relatively poorly resistant to impact damage which, in the case of aircraft structures, can be imparted in service (e.g. due to tool drops, runway debris or bird strikes)
Additionally, these composites may have relatively poor interlaminar properties and low resistance to delamination

Method used

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  • Products comprising reinforcing fibres and shape memory alloy wires and methods of making thereof
  • Products comprising reinforcing fibres and shape memory alloy wires and methods of making thereof
  • Products comprising reinforcing fibres and shape memory alloy wires and methods of making thereof

Examples

Experimental program
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Embodiment

[0116] In certain embodiments, the 3D preform is composed of non-interwoven layers of reinforcing fibers, SMA wires, or combinations thereof, wherein the layers are held together by tufted or stitched filaments traversing all layers. The tufted filaments are reinforcing fibers, SMA threads, or combinations thereof. In certain embodiments, the non-interwoven layer includes stabilizing fibers or filaments to form a non-curled fabric. In certain embodiments, the stabilizing fibers or filaments are polyester. The SMA wire may eg be a Ti-Ni alloy.

[0117] Figure 10 The photographs in show the opposing surfaces of an exemplary 3D preform comprising tufts (marked A) made of carbon fiber (marked A), polyester stabilizing filament (marked B), and SMA wire (e.g., Ti-Ni). Non-curled fabric made for C). However, in certain other embodiments, SMA wires may be present in the 2D layer of the preform (along with reinforcing fibers), and carbon fibers (eg, tows of carbon fibers) may be u...

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Abstract

A three-dimensional (3D) preform comprising reinforcing fibres and shape memory alloys (SMA) wires and a composite material comprising a polymer matrix with a 3D- preform embedded therein, wherein the3D-preform comprises reinforcing fibres and shape memory alloy (SMA) wires.

Description

technical field [0001] The present invention generally relates to three-dimensional (3D) preforms comprising reinforcing fibers and shape memory alloy (SMA) wires. The invention also relates to composite materials comprising a polymer matrix in which a 3D preform is embedded, wherein the 3D preform comprises reinforcing fibers and shape memory alloy (SMA) wires. Background technique [0002] Composites with high strength-to-weight ratios can be made by embedding relatively high modulus fibers in relatively low modulus polymer matrices. These materials are particularly useful in many aerospace, automotive and marine applications, for example. These materials can be made by producing fiber preforms and impregnating them with polymers or by layering pre-impregnated fiber layers. However, many composite materials of this type are relatively poorly resistant to impact damage which, in the case of aircraft structures, can be imparted in service (for example, due to tool drops, r...

Claims

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Application Information

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IPC IPC(8): B29C70/24B29C70/88D03D15/02D03D25/00
CPCB29C70/20B29C70/24B29C70/384B29C70/386B29C70/88B32B3/08B32B5/024B32B5/08B32B5/26C08J5/042D04H3/04D04H3/115B29K2995/0089B32B2250/20B32B2255/02B32B2255/26B32B2260/023B32B2260/046B32B2262/0253B32B2262/0269B32B2262/101B32B2262/106B32B2262/14B32B2307/50B32B2307/558B32B2605/18B29K2995/0091D03D25/005D10B2101/20B29B11/16B32B5/06B32B2250/05B32B7/09B32B2250/04B32B2307/54B32B2307/732B32B5/12B32B2571/00B32B5/10B32B5/026B32B2250/03B32B2605/00D03D15/67
Inventor A.D.福尔曼C.B.米克斯R.韦斯特
Owner QINETIQ LTD
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